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(Remodel.) ,A .2 swam-sheet; ELP, STIMSON.

SEWINGl MAGHINE JACK.

5 No. 272,390. v`lwemtga feb.' 13,1883.

UNITED STATES PATENT OFFICE.

HABLAN I. STIMSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO HERMAN B.

, GOODBICH, OF SAME PLACE.

SEWING-MAci-nNE JACK.

SPECIFICATION forming part of Letters Patent No. 272,390, dated February 13, 1883.

' Application filed April 1S, 1882. (No model.) l

To all whom it may concern Be it known that I, HABLAN P. STnvisoN, of Chicago, in the county of Cook and State of Illinois, have invented a new, useful, and Improved Sewing-Machine Jack, of which the following, in connection with the accompany-v ing drawings, is a specification.

. 111 the drawings, Figure 1 lSheet 1, is a front view or elevation of a sewing-machine 1o jack embodying my invention, showingthe same as when applied to the use for which it is intended. Fig. 2 is'a top or plan view ot' the jack. Fig. 3 is a side view or elevation. ot' one of the legs or standards of Ythe jack detached; and Fig. 4\ is a like representation, shown partly in section.

Like letters of reference indicatev like parts.

My object is to provide suitable support for sewing-machines while they are being timed, tested, or experimentally run or worked 5 and to that end my invention consists in the means, substantially as hereinafter set forth, which 1 employ for that purpose.

A represents my sewing machine jack, which may be described, in general terms, as consisting of adjustable supports adapted at their upper ends to engage or clamp the edge of the bottom or base plate ot' a sewing-machine.

B B are the adjustable supports above referred to, and au are the jaws or clamps at the upper ends thereof, and adapted to engage the edge of the bottom or-base plate of a sewing-machine, as indicated in Fig. 1, in which C represents a' sewing-machine supported and held by thejack.

As it is sometimes desirable to have the machine heldin a tilted or inclined position,-I deem it best to make the jaws a a vertically and independently adjustable, and this I ac 1 com-plish preferably by providing the jaws aA ce with a depending screw-stein, a', and by adapting the upper ends of the supports B B to receive the said stems, as is clearly indicated in Figs. 4 and 5. By this means the jaws a a mayy also be set to correspond to a curvature in the edge of the base-plate, as represented in Fig. 1.

To render the supports B B adjustable in all directions horizontally, so as to adapt the jack to machines differing in size, I provide the said supports with elongated feet B B', in which I make longitudinal slots b b, through which I-pass a screw-bolt, D, on which I run a clamp-nut, D', each upper foot being upset, as shown at c c, to overlap each lower foot, respectively, as clearly indicated in Fig. 1. ln practice the bolt D is made sufficiently long to be passed through a hole made in a bench or table for supporting thejack, and through the slots b b, as shown in Fig. 1, so that the jack may be held rmly in place-after the machine has been applied.

E represents an ordinary shop-bench; F, a driving-shaft; G, a belt-wheel orpulley, and H a drivebelt passing over the wheel Gr and over the drive-pulley of the machine. Any sewing-machine table may be employed insteadof the bench or table E for the purpose of supporting thejack, in which case the machine may be driven in the usual manner, a drive-belt of suitable length being employed.

I I are springs connected to the supports B B, and hooked upon the bolt D for the purpose of drawing the said supports in automatically toward the position they are to occupy while supporting the machine; but these springs, though preferable, are not absolutely essential.

It will be perceived, on reference to the drawings and from the foregoing description, 'p

that the jack is an independent device or structure adapted to support anysewingma chine or similar structure for the purposes set forth, and-to be applied to any suitable support removably and with facility. It is simple in its construction and operation and meets a need long felt. j

It is also obvious that some of the details of construction which I have described as being advantageous for the purpose of rendering the jack adjustable may be modified without departing from the scope of my invention.

Having thusdescribed my invention, what I claim as new, and desire to secure by Letters Patent, is-v 1. A sewing-machine jack having legs or supports provided at their upper ends with vertically-adjustable clamps orjaws, subsmm connected to the said" legs, the serewbolll D, tially as and for the purposes specified. and the clamp-nut D., substantially as and 2. A sewing-machine jack having legs or for the purposes speeied. supports provided with the clamps or jawsa 4. The combination, with the adjustable 15 5 af, connect-ed adjustably to the said legs or legs or supports of a sewingmachine jack, of supports by means of the screw-stems co a', the contraotible springs I I, substantially as depending from the said jaws and entering and for the purposes specified.

the said legs, substantially as and for the pur- HABLAN l. STIMSON. poses specified. Witnesses: 1o 3. The combination of the legs B B, having EDWARD F. SPALSBURY,

slotted feet B' B', the jaws aa, adjnstably JAMES STEPHENSON. 

